Abstract

The spin physics of perovskite nanocrystals with confined electrons or holes is attracting increasing attention, both for fundamental studies and spintronic applications. Here, stable CsPb(Cl0.56Br0.44)3 lead halide perovskite nanocrystals embedded in a fluorophosphate glass matrix are studied by time-resolved optical spectroscopy to unravel the coherent spin dynamics of holes and their interaction with nuclear spins of the 207Pb isotope. We demonstrate the spin mode locking effect provided by the synchronization of the Larmor precession of single hole spins in each nanocrystal in the ensemble that are excited periodically by a laser in an external magnetic field. The mode locking is enhanced by nuclei-induced frequency focusing. An ensemble spin dephasing time T2* of a nanosecond and a single hole spin coherence time of T2 = 13 ns are measured. The developed theoretical model accounting for the mode locking and nuclear focusing for randomly oriented nanocrystals with perovskite band structure describes the experimental data very well.

Halide perovskites have a variety of attractive feature such as high quantum yield, and tunable optical properties, combined with easy fabrication. Here, Kirstein et al demonstrate spin-mode locking in CsPb(Cl0.56Br0.44)3 lead halide perovskite nanocrystals embedded in a fluorophosphate glass matrix, and a hole spin lifetime extending into the microsecond range.

Details

Title
Mode locking of hole spin coherences in CsPb(Cl, Br)3 perovskite nanocrystals
Author
Kirstein, E. 1   VIAFID ORCID Logo  ; Kopteva, N. E. 1   VIAFID ORCID Logo  ; Yakovlev, D. R. 2   VIAFID ORCID Logo  ; Zhukov, E. A. 3   VIAFID ORCID Logo  ; Kolobkova, E. V. 4 ; Kuznetsova, M. S. 5   VIAFID ORCID Logo  ; Belykh, V. V. 6   VIAFID ORCID Logo  ; Yugova, I. A. 5   VIAFID ORCID Logo  ; Glazov, M. M. 7   VIAFID ORCID Logo  ; Bayer, M. 1   VIAFID ORCID Logo  ; Greilich, A. 1   VIAFID ORCID Logo 

 Technische Universität Dortmund, Experimentelle Physik 2, Dortmund, Germany (GRID:grid.5675.1) (ISNI:0000 0001 0416 9637) 
 Technische Universität Dortmund, Experimentelle Physik 2, Dortmund, Germany (GRID:grid.5675.1) (ISNI:0000 0001 0416 9637); Russian Academy of Sciences, Ioffe Institute, St. Petersburg, Russia (GRID:grid.4886.2) (ISNI:0000 0001 2192 9124); P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia (GRID:grid.425806.d) (ISNI:0000 0001 0656 6476) 
 Technische Universität Dortmund, Experimentelle Physik 2, Dortmund, Germany (GRID:grid.5675.1) (ISNI:0000 0001 0416 9637); Russian Academy of Sciences, Ioffe Institute, St. Petersburg, Russia (GRID:grid.4886.2) (ISNI:0000 0001 2192 9124) 
 ITMO University, St. Petersburg, Russia (GRID:grid.35915.3b) (ISNI:0000 0001 0413 4629); St. Petersburg State Institute of Technology, St. Petersburg, Russia (GRID:grid.437869.7) (ISNI:0000 0004 0497 4945) 
 St. Petersburg State University, Spin Optics Laboratory, St. Petersburg, Russia (GRID:grid.15447.33) (ISNI:0000 0001 2289 6897) 
 P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia (GRID:grid.425806.d) (ISNI:0000 0001 0656 6476) 
 Russian Academy of Sciences, Ioffe Institute, St. Petersburg, Russia (GRID:grid.4886.2) (ISNI:0000 0001 2192 9124) 
Pages
699
Publication year
2023
Publication date
2023
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2774363882
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.